ActionScript 3.0 :: Preloader Making Functions Not To Work

When I test the site with the preloader.swf file I made for it, it loads, but then some of my button functions do not work in the site. When I test the site fla file everything works fine. I have been trying things out with the preloader code, but not sure what would cause this.

This is my preloader code:
var l:Loader = new Loader();
l.contentLoaderInfo.addEventListener(ProgressEvent .PROGRESS, loop);
l.contentLoaderInfo.addEventListener(Event.COMPLET E, done);
l.load(new URLRequest("sample.swf"));
prog_mc.stop();
function loop(eventrogressEvent):void {
[Code] .....